Structural and luminescent diversities of Eu3+ activated Gd2O3 nanophosphors
In this work we investigated both structural and optical characteristic of erbium doped ternary TeO2-TiO2-Bi2O3 tellurite oxide based glasses, synthesized via melt-quench method. The X-ray diffraction (XRD) and differential scanning calorimetry (DSC) confirmed its glassy nature and stability. Raman...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Malaysia Terengganu
2017
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| Online Access: | http://psasir.upm.edu.my/id/eprint/63301/1/Structural%20and%20luminescent%20diversities%20of%20Eu3%2B%20activated%20Gd2O3%20nanophosphors.pdf http://psasir.upm.edu.my/id/eprint/63301/ http://jssm.umt.edu.my/wp-content/uploads/sites/51/2017/12/Chapter-7.pdf |
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| Institution: | Universiti Putra Malaysia |
| Language: | English |
| Summary: | In this work we investigated both structural and optical characteristic of erbium doped ternary TeO2-TiO2-Bi2O3 tellurite oxide based glasses, synthesized via melt-quench method. The X-ray diffraction (XRD) and differential scanning calorimetry (DSC) confirmed its glassy nature and stability. Raman analysis revealed the presence of various coordination state TeO2 network consisting stretching/bending vibrations of Te-O bonds in the [TeO4] trigonal bi-pyramid units and fraction of [TeO3, TeO3+1] trigonal pyramids. From optical absorption measurement both optical band gap and Judd-Ofelt analysis (intensity parameters Ωt (t=2, 4, 6), transition probabilities, and radiative lifetimes of the Er3+ ions) have been performed for both host and doped glasses respectively. Photoluminescence studies for upconversion and near-infrared emissions analysis (under 980 nm excitation at room temperature. Both optical transition mechanism which involved nonradiative energy transfer between Er3+ ions through cross-relaxation and energy migration were also explained in detailed. |
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